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 Dysmachus trigonus?
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| Paul Beuk |
Posted on 11-06-2007 23:10
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 Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
Checking before I put them in the gallery. About 10 days ago (3 June) I stumbled upon these two flies in copule. Even though the tempreature was running towards the 30's I could come very close (my camera is not that much state of the art) and shoot a few shot. The sun prevented me to see if any was really any good, but i am quite satisfied. Size about 12-13 mm (each), on bare, sandy soils. Paul Beuk attached the following image:  [85.94Kb] Paul - - - - Paul Beuk on https://diptera.info |
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| Paul Beuk |
Posted on 11-06-2007 23:11
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Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
Close up.
Paul Beuk attached the following image:  [40.2Kb] Paul - - - - Paul Beuk on https://diptera.info |
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| Paul Beuk |
Posted on 01-07-2007 18:07
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Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
No one?
Paul - - - - Paul Beuk on https://diptera.info |
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| Cor Zonneveld |
Posted on 01-07-2007 22:35
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 Member Location: Amstelveen, the Netherlands Posts: 840 Joined: 14.10.06 |
Yours look not quite so bristly as mine, which Mark van Veen IDed as trigonus.
Cor Zonneveld attached the following image:  [142.75Kb] Thanks for your attention Cor Zonneveld |
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| Paul Beuk |
Posted on 11-10-2007 08:51
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Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
Danny? Can you tell more?
Paul - - - - Paul Beuk on https://diptera.info |
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| conopid |
Posted on 11-10-2007 14:59
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 Member Location: United Kingdom Posts: 1039 Joined: 02.07.04 |
Paul, i find that the best feature to determine Dysmachus trigonus is the "fans" of long hairs at the margins of the tergites. These show up best when viewed dorsally. I cannot make these out in your photos, but the angle is not good for viewing this feature. Did you get any dorsal shots? Nigel Jones, Shrewsbury, United Kingdom |
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| Danny Wolff |
Posted on 11-10-2007 20:29
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 Member Location: Germany Posts: 329 Joined: 27.05.04 |
Hello Paul, yes, I think it is Dysmachus trigonus. Other Dutch species with (nearly) completely black legs would not fit other characters seen in your image. Do you have a detail of the genitalia? Shape of the ovipositor is very characteristic in trigonus. Greetings, Danny |
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| conopid |
Posted on 12-10-2007 09:44
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Member Location: United Kingdom Posts: 1039 Joined: 02.07.04 |
Paul, I agree with Danny. On closer inspection of the third photo, you can easily see some of the fans of hairs sticking out above the abdomen - on the opposite side of the abdomen from the camera. conopid attached the following image:  [57.98Kb] Edited by conopid on 12-10-2007 09:47 Nigel Jones, Shrewsbury, United Kingdom |
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| Paul Beuk |
Posted on 12-10-2007 09:54
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Super Administrator Location: Netherlands Posts: 19363 Joined: 11.05.04 |
I have to dig up the original images.
Paul - - - - Paul Beuk on https://diptera.info |
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| John Smit |
Posted on 12-10-2007 11:25
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 Member Location: Utrecht Posts: 565 Joined: 05.10.04 |
The easiest characters for ID-ing this species in the Netherlands is the combination of black legs and the bristles on the thorax, going all the way to the head, in stead of being restricted to the posterior part. John |
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